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5.1
Feed section
Is the voltage present at both
sides of the feed motor?
Is the voltage output at pin 17
and pin 18 of IC681?
Is the voltage input at pin 24
of IC681?
Is the voltage output at pin 40
of IC621?
Is the power supply present
at pin 6, pin 15, pin 25, pin 39,
pin 43, pin 48, pin 51 and pin
64 of IC621?
Check the connections of
TE
L 13942296513
CD8V power supply.
5.2
Focus section
When the lens is moving:
Does the S-search waveform
appear at IC681 pin 13 and
pin 14?
Is the voltage input at pin 1
and pin 2 of IC681?
Is the voltage output at pin 33
of IC621?
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Is the power supply present
at pin 6, pin 15, pin 25, pin 39,
pin 43, pin 48, pin 51 and pin
64 of IC621?
.
Check the connections of
CD8V power supply.
1-44 (No.MA220)
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SECTION 5
TROUBLESHOOTING
YES
Check the feed motor.
NO
Check the connections
YES
between the feed motor and
IC681.
NO
Is the power supply present
YES
at pin 10, pin 19 and pin 28
of IC681?
Check the connections of
CD8V power supply.
NO
YES
Check the connections
between IC681 and IC621.
NO
YES
NO
YES
Check the pickup and
4V
its connections.
NO
Is the power supply present
YES
at pin 10, pin 19 and pin 28
of IC681?
Check the connections of
CD8V power supply.
NO
YES
Check the connections
between IC681 and IC621.
NO
YES
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y
i
NO
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8
YES
NO
Check IC621.
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3
6 7
1 3
YES
NO
Check IC621.
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2 9
9 4
2 8
Check IC681.
1 5
0 5
8
2 9
9 4
Check IC681.
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co
9 9
2 8
9 9
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